Rigorous EM Scattering Solution From a Slit in an IBC Plate With Different Surface Impedances Placed Between Two Different Chiral Media

Davoudabadifarahani, Hossein; Ghalamkari, Behbod

doi:10.1109/tap.2022.3187510

Cited by 3 publications

(3 citation statements)

References 35 publications

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“…This model obviates the need to calculate the specific distribution of the internal fields within the medium, bypassing challenges associated with deriving and computing Green's functions in complex medium coating structures. Consequently, it enables the rapid resolution of scattering problems and has found extensive application in the EM scattering studies of targets with diverse medium coatings or coverings [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Efficient EM Scattering Modeling from Metal Targets Coated with Anisotropic Thin Layers

Hua,

2024

Electronics

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To address the challenges posed by composite targets composed of an anisotropic medium and metal in electromagnetic (EM) scattering calculations, this paper introduces an innovative hybrid algorithm tailored for simulating the EM scattering characteristics of such complex targets. Utilizing impedance boundary condition (IBC), the method employs surface impedance vectors to precisely depict the EM properties of the medium. By harnessing the distinct advantages of the Method of Moments (MoMs) at low frequency and Physical Optics (POs) at high frequency, the algorithm ensures both accuracy and efficiency in the EM simulation of composite targets. By transforming the EM scattering problem of targets coated with a thin-layered medium into an equivalent radiation problem of EM currents on impedance surfaces, this research has achieved rapid and high-precision calculations of the Radar Cross Section (RCS) for complex targets with anisotropic medium coatings. To assess the performance of the algorithm, three target models—square plates, simplified aircraft, and complex satellites—are selected as test cases. The dual metrics of RCS and surface current distribution are utilized as evaluation benchmarks, and comparisons are made against the Method of Moments–Finite Element Method (MoM-FEM) hybrid numerical method. The comparative results demonstrate that the proposed method meets the engineering standards in terms of both the root mean square error (RMSE) of RCS and the relative error in surface current distribution, while also achieving a significant improvement of over 50% in computational efficiency, thereby validating its superior accuracy and practical utility.

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Section: Introductionmentioning

confidence: 99%

“…Equation (11) represents the matrix equation derived from the MoM-PO hybrid method. T PO,S MM = [T PO,S MM kn ] reflects the excitation effect of the MoM region current on the PO region and can be referred to as the excitation matrix.…”

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confidence: 99%

Efficient EM Scattering Modeling from Metal Targets Coated with Anisotropic Thin Layers

Hua,

2024

Electronics

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“…Thus far, the KP method has been applied to specific geometries including flanged waveguides, rectangular strip and crack, and rectangular and circular plates and holes [9][10][11][12][13][14][15][16][17]. In many related works, the geometry of the structure has remained unchanged, and only the medium is varied [18][19][20][21][22][23][24][25][26][27]. Also, the presentation of the method and its numerical implementation is complicated and requires some knowledge of hypergeometric functions and Jacobi's polynomials.…”

Section: Introductionmentioning

confidence: 99%

Diffraction by a Parallel-Plate Multiport Using the Method of Kobayashi Potentials

Honarbakhsh

2023

Scientia Iranica

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Application of Kobayashi potentials (KP) is extended to the electromagnetic (EM) diffraction from the parallel-plate multiport. Standard integral identities are used for problem formulation, without the direct use of Weber-Schafheitlin (WS) integrals. The Fourier function space is exploited for the construction of the governing linear system of equations. A simple strategy is suggested for the evaluation of the required improper integrals. Two-dimensional T-and X-junctions are studied as special cases. Numerical results are validated through convergence test and asymptotic analysis. It is shown that whenever the wave number in the whole problem domain is positive, no real power transfers to the diffracted field in the horizontal section of the aforementioned structures.

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Closed-form expressions for some of the integrals related to the method of Kobayashi potential

Honarbakhsh

2024

Applied Mathematics and Computation

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Rigorous EM Scattering Solution From a Slit in an IBC Plate With Different Surface Impedances Placed Between Two Different Chiral Media

Cited by 3 publications

References 35 publications

Efficient EM Scattering Modeling from Metal Targets Coated with Anisotropic Thin Layers

Efficient EM Scattering Modeling from Metal Targets Coated with Anisotropic Thin Layers

Diffraction by a Parallel-Plate Multiport Using the Method of Kobayashi Potentials

Closed-form expressions for some of the integrals related to the method of Kobayashi potential

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